%0 Journal Article
%A Rudolf, Katharina
%A Voigt, Linus
%A Muench, Simon
%A Frankenstein, Lars
%A Landsmann, Justin
%A Schubert, Ulrich S.
%A Winter, Martin
%A Placke, Tobias
%A Kasnatscheew, Johannes
%T Radical Polymer‐based Positive Electrodes for Dual‐Ion Batteries: Enhancing Performance with γ‐Butyrolactone‐based Electrolytes
%J ChemSusChem
%V 17
%N 17
%@ 1864-5631
%C Weinheim
%I Wiley-VCH
%M FZJ-2024-05232
%P e202400626
%D 2024
%Z The authors acknowledge the German research foundation (DFG) for funding within the priority program SPP 2248 “Polymer-based Batteries.
%X Dual-ion batteries (DIBs) represent a promising alternative for lithium ion batteries (LIBs) for various niche applications. DIBs with polymer-based active materials, here poly(2,2,6,6-tetramethylpiperidinyl-N-oxyl methacrylate) (PTMA), are of particular interest for high power applications, though they require appropriate electrolyte formulations. As the anion mobility plays a crucial role in transport kinetics, Li salts are varied using the well-dissociating solvent γ-butyrolactone (GBL). Lithium difluoro(oxalate)borate (LiDFOB) and lithium bis(oxalate)borate (LiBOB) improve cycle life in PTMA||Li metal cells compared to other Li salts and a LiPF6- and carbonate-based reference electrolyte, even at specific currents of 1.0 A g−1 (≈10C), whereas LiDFOB reveals a superior rate performance, i. e., ≈90 % capacity even at 5.0 A g−1 (≈50C). This is attributed to faster charge-transfer/mass transport, enhanced pseudo-capacitive contributions during the de-/insertion of the anions into the PTMA electrode and to lower overpotentials at the Li metal electrode.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 38747027
%U <Go to ISI:>//WOS:001248815400001
%R 10.1002/cssc.202400626
%U https://juser.fz-juelich.de/record/1030122